This might help your explorations (derived from the user manuals, so I may have missed things). I have briefiy compared Syntronik 2 with Syntronik 1:
Library
-- has its own dedicated folder
-- the Syntronik 1 folder can be added too
Disk streaming optimization
Preset Browser
-- name changed from Instrument Browser
-- "Instruments" are now referred to as "Presets"
-- synth and preset names and info are smaller and darker (less distinct),
-- and bizarrely, fewer presets are listed on a single view,
-- there seems to be to be a lot of unnecessary black background and small text and images.
Synth Panel
-- Extra parameters ( (LFO) Delay and Fade-In)
(a) the new Synth Panels introduced in Syntronik 2 (such as CATO and GS-V) have a few extra parameters in the Oscillator and Modulation sections.
(b) These extra parameters are also available for all Synths on the Edit Panel.
-- Filter Envelope Amount
(a) In the new Syntronik 2 presets – including all new presets for the 22 legacy Syntronik 1 Synths – the filter envelope amount works as it does in traditional analog hardware synthesizers: The control is additive. Turn up the Filter Envelope Amount knob to increase how much the envelope opens the filters.
(b) This works differently for the legacy Syntronik 1 presets. It scales the existing cutoff frequency - to determine how much the filter envelope will close the filter; how much it will reduce the filter cutoff frequency.
(c) This is because Syntronik 1 used the ST3 engine, and Syntronik 2 uses the ST4 engine. In order to ensure that the legacy presets sound identical in Syntronik 2, the ST3 engine is included here to play them.
MIDI learn:
-- controlling Master Volume and Vibrato Controller Source are not mentioned,
-- in Syntronik 1 "Note that the MIDI CC assignments are stored with the Multi, not with the Instrument".
-- this is not mentioned fin the Syntronik 2 User Manual,
Edit Panel and Modulation Matrix
-- all new
-- not available for Legacy Syntronik 1 presets
Effects
-- there are 71 available (38 in Syntronik 1)
-- but there are now no pics in the User Manual
-- and still no description of the controls of each one.
Player Panel
-- name changed from Arpeggiator Panel
-- Step Sequencer Mode is new: a simple monophonic step sequencer in the style of classic 1970s sequencers
Multi Panel
-- Mixer controls are now directly available to the left of each part
-- new Note Shift (Transpose) control for each part